Entries in Rachel "Bunny" Mellon
(1)

Photo Courtesy - ABC News(WASHINGTON) -- In a sign that the government may be preparing criminal charges against John Edwards, federal prosecutors are seeking recorded testimony of 100-year-old multi-millionaire heiress Rachel "Bunny" Mellon, ABC News has learned.

In an unusual twist, the prosecutors have requested that attorneys for Edwards also be present for the questioning. Mellon was informed of the request early this week. If she consents, the meeting would take place at Mellon's sprawling estate in Virginia, according to sources with knowledge of the investigation.

A federal grand jury in North Carolina has been hearing evidence in a wide-ranging probe of Edwards' 2008 presidential campaign and the alleged cover-up of Edwards' affair with videographer Rielle Hunter, who gave birth to Edwards' child in February 2008. Sources close to the case tell ABC News that a decision on whether to seek an indictment of Edwards is expected within the next few weeks.

Rachel Mellon has already been interviewed at least twice by investigators working on the grand jury probe, according to sources. Four of her relatives testified before the grand jury late last year, flying on Mellon's private jet from Virginia to North Carolina, where they were met by the FBI. If the government levels charges against Edwards, Mellon would likely be called to testify at trial.

Edwards has not commented publicly on the investigation since May 2009. In his statement then, he expressed confidence "that no funds from my campaign were used improperly." People Magazine last month quoted an unidentified source close to Edwards as saying, "John's optimistic nothing is going to come of it, but even if not, he's like, 'Let's get there, already.'"